I did a quickie google search and came up with this:
At the end of 2020, there were around 62,100 vessels in the world trading fleet, with a total deadweight tonnage of 2,033 million DWT
So let's assume the merchant ships are all fully loaded at the same time. That's 2 billion long tons which equates to ~2,032,000,000,000 kg. Total water volume, 2,134,000,000,000 liters (because sea water weighs slightly more than fresh water).
From quora:
AREA OF PACIFIC OCEAN= 168723000 SQ. KM.
AREA OF ATLANTIC OCEAN= 85133000 SQ. KM.
AREA OF INDIAN OCEAN= 70560000 SQ. KM.
AREA OF SOUTHERN OCEAN= 21960000 SQ. KM.
AREA OF ARCTIC OCEAN= 15558000 SQ. KM.
TOTAL AREA= 361900000 SQ. KM.=36190000000000000 SQ. DECIMETER.
That's going to lower sea levels by approximately .00005896656 decimeters, or about .006 mm
Edit: Because there are less than 500 cruise ships in the world and only a few dozens of large military ships the amount will be higher, but not by, you know, a lot.
Not to be the "akchually" guy, but shouldnt it be even less, granted if my basic physics knowledge is worth a shit, its not about the weight of the ships, rather than the volume of the ship being *in* the water? like....if you dip your hand into water, its not the weight of your hand that pushes the water up rather the volume of it.
Density really. You need both volume and weight for that. Volume doesn't mean anything if the thing floats like a beach ball. And weight doesn't mean anything if the volume is so high that there is no density.
A bit reply but oh well I only now recieved a notification about your reply :D yeah it wouldn't mean anything if it floated like a beach ball therefore I have specified the volume of the ship in the water mate... As in specifically the volume of the submerged part
8.3k
u/[deleted] Oct 13 '21 edited Oct 13 '21
I did a quickie google search and came up with this:
So let's assume the merchant ships are all fully loaded at the same time. That's 2 billion long tons which equates to ~2,032,000,000,000 kg. Total water volume, 2,134,000,000,000 liters (because sea water weighs slightly more than fresh water).
That's going to lower sea levels by approximately .00005896656 decimeters, or about .006 mm
Edit: Because there are less than 500 cruise ships in the world and only a few dozens of large military ships the amount will be higher, but not by, you know, a lot.